There is hereby created a Board of Adjustment for the City of Grain Valley, Missouri. The Board of Adjustment shall consist of five (5) members, who shall be citizens of the City. Members shall be appointed by the Mayor and approved by the Board of Aldermen for terms of five (5) years each. All members shall be removable for cause by the appointing authority upon written charges and after public hearing. Vacancies shall be filled for the unexpired term of any member whose term becomes vacant. The Board shall elect its own Chairman, who shall serve for one (1) year. The Board shall adopt its own rules of procedure not inconsistent with this Chapter. Meetings of the Board shall be held at the call of the Chairman and at such other times as the Board may determine. Such Chairman or, in his/her absence, the Acting Chairman may administer oaths and compel the attendance of witnesses. All meetings of the Board shall be open to the public. The Board shall keep minutes of its proceedings showing the vote of each member upon question or, if absent or failing to vote, indicating such fact and shall keep records of its examinations and other official actions, all of which shall be immediately filed in the office of the City Clerk and shall be a public record.